var turnplate = {
    restaraunts: [],				//大转盘奖品名称
    colors: [],					//大转盘奖品区块对应背景颜色
    outsideRadius: 180,			//大转盘外圆的半径
    textRadius: 120,				//大转盘奖品位置距离圆心的距离
    insideRadius: 55,			//大转盘内圆的半径
    startAngle: 0,				//开始角度
    randomRate: [],              //控制获奖率，百分制(相加需等于100%)，对应restaraunts(顺序需要保持一致)，
    bRotate: false				//false:停止;ture:旋转
};
function guanbi(){
    $(".tanchuang").hide();
    setTimeout(function() {
        window.location.reload();
    }, 1000)
}
$(document).ready(function () {
    //动态添加大转盘的奖品与奖品区域背景颜色
    turnplate.restaraunts = $("#restaraunts").val();
    turnplate.colors = $("#colors").val();
    turnplate.randomRate = $("#randomRate").val();


    var rotateTimeOut = function () {
        $('#wheelcanvas').rotate({
            angle: 0,
            animateTo: 2160,
            duration: 8000,
            callback: function () {
                alert('网络超时，请检查您的网络设置！');
            }
        });
    };

    //旋转转盘 item:奖品位置; txt：提示语;
    var rotateFn = function (item, txt) {
        var angles = item * (360 / turnplate.restaraunts.length) - (360 / (turnplate.restaraunts.length * 2));
        if (angles < 270) {
            angles = 270 - angles;
        } else {
            angles = 360 - angles + 270;
        }
        $('#wheelcanvas').stopRotate();
        $('#wheelcanvas').rotate({
            angle: 0,
            animateTo: angles + 1800,
            duration: 8000,
            callback: function () {
                var html = '';
                $(".tanchuang").show();
                $(".tanchuang").empty();
                html += '<a class="guanbi" onclick="guanbi()"></a>';
                html += '<div class="tcbg">';
                html += '<h2>温馨提示</h2>';
                html += '<div class="jieshi" style=" text-align:center; top:50%; font-size:28px;">' + txt + '</div>';
                html += '</div>';
                $(".tanchuang").html(html);
                turnplate.bRotate = !turnplate.bRotate;
            }
        });
    };

    $('.pointer').click(function () {
        if (turnplate.bRotate) return;
        turnplate.bRotate = !turnplate.bRotate;
        //获取随机数(奖品个数范围内)
        var item = rnd(turnplate.randomRate);
        if(item == undefined){
            var item = rnd(turnplate.randomRate);
        }
        console.log(item);
        //奖品数量等于10,/[252, 216, 180, 144, 108, 72, 36, 360, 324, 288]
        rotateFn(item, turnplate.restaraunts[item - 1]);
    });
});

function rnd(rate) {
    var random = Math.floor(Math.random() * 100);

    var myRandom = [];
    var randomList = [];
    var randomParent = [];
    for (var i = 0; i < 100; i++) {
        myRandom.push(parseInt([i]) + 1);
    }
    for (var i = 0; i < rate.length; i++) {
        var temp = [];
        var start = 0;
        var end = 0;
        randomList.push(parseInt(rate[i].split('%')[0]));
        for (var j = 0; j < randomList.length; j++) {
            start += randomList[j - 1] || 0
            end += randomList[j]
        }
        temp = myRandom.slice(start, end);
        randomParent.push(temp)
    }
    for (var i = 0; i < randomParent.length; i++) {
        if ($.inArray(random, randomParent[i]) > 0) {
            return (i + 1)
        }
    }

}


//页面所有元素加载完毕后执行drawRouletteWheel()方法对转盘进行渲染
window.onload = function () {
    drawRouletteWheel();
};

function drawRouletteWheel() {
    var canvas = document.getElementById("wheelcanvas");
    if (canvas.getContext) {
        //根据奖品个数计算圆周角度
        var arc = Math.PI / (turnplate.restaraunts.length / 2);
        var ctx = canvas.getContext("2d");
        //在给定矩形内清空一个矩形
        ctx.clearRect(0, 0, 422, 422);
        //strokeStyle 属性设置或返回用于笔触的颜色、渐变或模式  
        ctx.strokeStyle = "#333";
        //font 属性设置或返回画布上文本内容的当前字体属性
        ctx.font = '16px Microsoft YaHei';
        for (var i = 0; i < turnplate.restaraunts.length; i++) {
            var angle = turnplate.startAngle + i * arc;
            ctx.fillStyle = turnplate.colors[i];
            ctx.beginPath();
            //arc(x,y,r,起始角,结束角,绘制方向) 方法创建弧/曲线（用于创建圆或部分圆）    
            ctx.arc(211, 211, turnplate.outsideRadius, angle, angle + arc, false);
            ctx.arc(211, 211, turnplate.insideRadius, angle + arc, angle, true);
            ctx.stroke();
            ctx.fill();
            //锁画布(为了保存之前的画布状态)
            ctx.save();

            //----绘制奖品开始----
            ctx.fillStyle = "#333";
            var text = turnplate.restaraunts[i];
            var line_height = 17;
            //translate方法重新映射画布上的 (0,0) 位置
            ctx.translate(211 + Math.cos(angle + arc / 2) * turnplate.textRadius, 211 + Math.sin(angle + arc / 2) * turnplate.textRadius);

            //rotate方法旋转当前的绘图
            ctx.rotate(angle + arc / 2 + Math.PI / 2);

            /** 下面代码根据奖品类型、奖品名称长度渲染不同效果，如字体、颜色、图片效果。(具体根据实际情况改变) **/
            console.log(text);
            if (text.indexOf("M") > 0) {
              //流量包
                var texts = text.split("M");
                for (var j = 0; j < texts.length; j++) {
                    ctx.font = j == 0 ? 'bold 20px Microsoft YaHei' : '16px Microsoft YaHei';
                    if (j == 0) {
                        ctx.fillText(texts[j] + "M", -ctx.measureText(texts[j] + "M").width / 2, j * line_height);
                    } else {
                        ctx.fillText(texts[j], -ctx.measureText(texts[j]).width / 2, j * line_height);
                    }
                }
            } else if (text.indexOf("M") == -1 && text.length > 6) {
              //奖品名称长度超过一定范围 
                text = text.substring(0, 6) + "||" + text.substring(6);
                var texts = text.split("||");
                for (var j = 0; j < texts.length; j++) {
                    ctx.fillText(texts[j], -ctx.measureText(texts[j]).width / 2, j * line_height);
                }
            } else {
                //在画布上绘制填色的文本。文本的默认颜色是黑色
                //measureText()方法返回包含一个对象，该对象包含以像素计的指定字体宽度
                ctx.fillText(text, -ctx.measureText(text).width / 2, 0);
            }

            //添加对应图标
            /*if(text.indexOf("猫币")>0){
                var img= document.getElementById("shan-img");
                img.onload=function(){  
                    ctx.drawImage(img,-15,10);      
                }; 
                ctx.drawImage(img,-15,10);  
            }else if(text.indexOf("谢谢参与")>=0){
                var img= document.getElementById("sorry-img");
                img.onload=function(){  
                    ctx.drawImage(img,-15,10);      
                };  
                ctx.drawImage(img,-15,10);  
            }*/
            //把当前画布返回（调整）到上一个save()状态之前 
            ctx.restore();
            //----绘制奖品结束----
        }
    }
}